Ampulla of VaterOviductsCommon Bile Duct NeoplasmsFallopian TubesOvum TransportSperm TransportPancreaticoduodenectomyBiliary Tract NeoplasmsDuodenal NeoplasmsDuodenoscopyChickensSpermatozoaOvulationEstrusHair Cells, AmpullaJaundiceDiethylstilbestrolGenitalia, FemaleEndolymphSemicircular CanalsCarcinoma, Signet Ring CellCholangiopancreatography, Endoscopic RetrogradeFertilizationUterusBile Duct NeoplasmsSperm MotilityCommon Bile Duct DiseasesSomatostatinomaEstrous CycleInsemination, ArtificialChlamydia muridarumEpitheliumCarcinoid TumorGallstonesProgesteroneSperm-Ovum InteractionsKrukenberg TumorDuodenoscopesDuodenumEstradiolAdenocarcinomaDuodenal DiseasesCommon Bile DuctPhotomicrographyMixed Tumor, MalignantPancreatic DuctsImmunohistochemistryPregnancyCarcinoma, NeuroendocrineShrewsBiliary Tract Surgical ProceduresKeratin-7CattleNeoplasms, Multiple PrimaryEpithelial CellsTakotsubo CardiomyopathyMicroscopy, Electron, ScanningFollicular PhaseGallbladder NeoplasmsSperm CapacitationSharksOvipositionMetestrusBlastocystOvalbuminMucous MembraneCarcinoma, Large Cell